/* 
 * This code is part of the notepad application, a sample application
 * for the SmartLink project, see
 * 
 * 		http://code.google.com/p/smartlink/.
 * 
 * It is a slightly modified version of the original notepad sample application 
 * distributed by Google as part of the Android SDK, see
 * 
 * 		http://code.google.com/android/samples/NotePad/index.html.
 * 
 * The modifications have the purpose of making the notepad application
 * acting as a "smartlink client" and "smartlink server" application.
 * What this means and the necessary requirements can be found in the documentation
 * of the SmartLink project. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.notepad;

import com.google.provider.NotePad;

import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

/**
 * An activity that will edit the title of a note. Displays a floating window
 * with a text field.
 */
public class TitleEditor extends Activity implements View.OnClickListener {

	/**
	 * This is a special intent action that means "edit the title of a note".
	 */
	public static final String EDIT_TITLE_ACTION = "com.google.android.notepad.action.EDIT_TITLE";

	/**
	 * Index of the title column
	 */
	private static final int TITLE_INDEX = 1;

	/**
	 * An array of the columns we are interested in.
	 */
	private static final String[] PROJECTION = new String[] { NotePad.Notes._ID, // 0
			NotePad.Notes.TITLE, // 1
	};

	/**
	 * Cursor which will provide access to the note whose title we are editing.
	 */
	Cursor mCursor;

	/**
	 * The EditText field from our UI. Keep track of this so we can extract the
	 * text when we are finished.
	 */
	EditText mText;

	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);

		setContentView(R.layout.title_editor);

		// Get the uri of the note whose title we want to edit
		Uri uri = getIntent().getData();

		// Get a cursor to access the note
		mCursor = managedQuery(uri, PROJECTION, null, null);

		// Set up click handlers for the text field and button
		mText = (EditText) this.findViewById(R.id.title);
		mText.setOnClickListener(this);

		Button b = (Button) findViewById(R.id.ok);
		b.setOnClickListener(this);
	}

	@Override
	protected void onResume() {
		super.onResume();

		// Initialize the text with the title column from the cursor
		if (mCursor != null) {
			mCursor.first();
			String title = mCursor.getString(TITLE_INDEX);
			mText.setText(title);
		}
	}

	@Override
	protected void onPause() {
		super.onPause();

		// Write the text back into the cursor
		if (mCursor != null) {
			String title = mText.getText().toString();
			mCursor.updateString(TITLE_INDEX, title);
			mCursor.commitUpdates();
		}
	}

	public void onClick(View v) {
		// When the user clicks, just finish this activity.
		// onPause will be called, and we save our data there.
		finish();
	}
}
